CN105586514A - Turbo machine blade machining technology with Al-Mn-Pb-Mg-Ti series high-strength aluminum alloy as material - Google Patents

Abstract

The invention discloses a turbo machine blade machining and manufacturing technology with Al-Mn-Pb-Mg-Ti series high-strength aluminum alloy as a material and belongs to the field of the heat treatment and corrosion resistance comprehensive technology. The adopted machining technology includes the processes of smelting casting, normalizing treatment, machining, carburizing treatment, stress relieving treatment and rust-proof treatment. The mechanical performance of the material is greatly improved compared with that of zinc base alloy; the casting performance and the cutting machining performance of the material are also better; and compared with a previous aluminum alloy casting and a material of a part used for mechanical cutting of the aluminum alloy casting, the tension resistance, the elongation percentage, the high-temperature-resisting effect, the casting performance and the machining performance of the material are obviously improved. By means of the turbo machine blade machining and manufacturing technology, reasonable elements of the material are contained, the novel technological processes are adopted, and therefore a manufactured turbo machine blade is high in bending resistance, high in anti-hitting capability, good in blade quality and not liable to be broken, has a prolonged service life and meets actual production needs, and the machining technology is widely applied.

Description

A kind of turbine blade processing technology that is material with Al-Mn-Pb-Mg-Ti series high strength aluminium alloy

Technical field

This invention belongs to heat treatment and anticorrosion complex art field, relates to Al-Mn-Pb-Mg-Ti series high strengthAluminium alloy and turbine blade thereof, especially one is material with Al-Mn-Pb-Mg-Ti series high strength aluminium alloyThe turbine blade processing and manufacturing processing technology of material.

Background technology

Facts have proved, γ ' is the main hardening constituent of Al-Mn-Pb-Mg-Ti series high strength aluminium alloy mutually, itsThe performance of quantity, size, form and distribution alloy has conclusive impact. Reduce Re, Cr content and increaseAdding a certain amount of Mo, W, Al not only can Equilibrated Alloying, and can strengthen γ ' phase, improves alloyCombination property is an effective way that solves aluminium alloy high-temperature stability. Meanwhile, in the time of design alloy, go backShould take into full account the generation of the harmful phase of carbonization phase and TCP, because blade often adopts high temperature alloy, and its shapeBecome increasingly complex, weight requires more and more lighter, causes manufacture difficulty increasing. Therefore model casting becomesOne of technique of blade processing first-selection. Experience the research and development of nearly 50 years, China develops aspect castingAs high-temperature alloy blades, large-scale complex thin-wall integral structure component precision casting technology, but still exist at present certainProblem, precision casting technology, casting quality and the dimensional accuracy deficiency matching with design alloy as lacked, fusing goldThe degree of superheat belonging to is large etc.

Summary of the invention

For the deficiencies in the prior art, the present invention, in order to address the above problem, has designed a kind of useThe turbine blade processing and manufacturing processing technology that Al-Mn-Pb-Mg-Ti series high strength aluminium alloy is material.

The present invention has designed a kind of turbine leaf that is material with Al-Mn-Pb-Mg-Ti series high strength aluminium alloySheet processing and manufacturing processing technology, its material has mainly comprised the degree of time column element: Si3.7％-4.2％，Mn0.8％-1.3％，Mg0.52％-0.74％，Ti0.21％-0.3％，Cr1.25％-1.48％,Cu < 0.02% comprises the mixture of the Dy of 0.001%-0.2% and the Bi of 0.041%-0.08% simultaneously, and surplus isAluminium and inevitably impurity. Preferably Si3.7%-4.2%, Mn0.8%-1.3%, Mg0.52%-0.74%,Ti0.21%-0.3%, Cu < 0.02%, Cr1.25%-1.48%, comprise simultaneously 0.001%-0.2% Dy andThe mixture of the Bi of 0.041%-0.08%. Its processing process is as follows: (1) alloy melting: by metalAluminium, magnesium, manganese, titanium, silicon etc. and Al-Cr, Al-Mg, Al-Ti intermediate alloy is at the bar of argon gas protectionUnder part, carry out melting, smelting temperature is 770 DEG C-920 DEG C, temperature retention time, and 20-27 minute, afterwards by liquationPour into alloy-steel casting, pouring temperature is 800 DEG C-830 DEG C, and casting die is metal type dies, metal moldMold preheating temperature is 150-180 DEG C, and (2) normalized treatment adopts isothermal annealing, and blank is added to high temperatureIn smelting furnace, be heated to 910 DEG C-940 DEG C, temperature retention time is 2-3h, is cooled to 600-640 DEG C with stove,Insulation 5-8h, then air cooling, (3) carry out machined to turbine blade, adopt numerical control input program automaticMilling blade, introduces lubricating fluid man-hour adding, and is sprayed in surface of the work, prevents and treats mechanical neoplasia and bandWalk the heat that processing produces, this cooling fluid is the free of contamination thin ice pellets of a Green, is sprayed at a high speed workpiece and cutterTool surface, its fast instantizing is liquid droplet, (4) Carburization Treatment, carries out high-temperature nitridation, adoptsTurbine blade is put into nitriding furnace and nitrogen and hydrogen heat altogether by ionitriding, at the table of turbine bladeFace forms nitriding layer, and temperature is controlled at 750-810 DEG C, insulation 3-4h, and Slow cooling, carburizing depth is0.51-0.78 μ m, (5) carry out double quenching and lonneal processing to turbine blade, are to formQuench in the surface of the turbine blade of nitriding layer, its temperature control is 820-900 DEG C and it is lowered the temperature backFire, temperature is 160-240 DEG C, quenching and tempering hardness 55-67HRC, turbine blade is placed in deposition by (6)In stove, be heated to 1200-1400 DEG C, with H₂For carrier is by TiCl₄Bring reactor into, SiC is deposited on to bladeSurface, (7) antirust, anti-corrosive processing, puts into hydraulic oil by workpiece, and temperature is 40-50 DEG C, and the time is20-25min。

Advantage of the present invention is as follows: after nitriding is processed, workpiece is carried out to surface anticorrosive processing, improved leafSheet is in the life-span using, and alloy prepared by the present invention adds Cr1.25%-1.48% Equilibrated Alloying, thereby protectsHold and organize stable orientation to solidify the service life that helps prolongation goods with single crystal casting, material of the present invention compares zinc-baseThe mechanical performance of alloy has increased significantly, and casting character and machinability are also better, and this closesGold copper-base alloy performance and former aluminium alloy castings and machine cut thereof is with compared with the material of parts, its resistance to tensionAnd elongation and high-temperature resistant result and casting character and machining property obviously improve, the present invention not onlyBe equipped with a kind of rational element of material, and the flow process of adopting new technology, thereby make the turbine blade of making,Bending resistance is strong, and anti-strike ability is strong, and leaf quality is good, and not easy fracture, has extended service life, reachesProduce actual needs, therefore this processing technology is used widely, the vanes spy of manufacturing of the present inventionAfter different Technology for Heating Processing, crystal segregation degree is less, and non-oxidizability, corrosion stability are good, employing moltenThe alloy of mould casting method and design complements one another, and shell mould material, performance meet blade and manufacture requirement.

Detailed description of the invention

Embodiment mono-

Designed a kind of turbine blade processing and manufacturing processing technology, its material therefor is Al-Mn-Pb-Mg-TiSeries high strength aluminium alloy, has mainly comprised the degree of time column element: Si3.7%, Mn0.8%, Mg0.52%, Ti0.21%, Cr1.25%, Cu < 0.02% comprises 0.078% Dy and 0.041% simultaneouslyThe mixture of Bi, surplus is aluminium and inevitable impurity thereof, its processing process is as follows: (1) alloyMelting: by metallic aluminium, magnesium, manganese, titanium, silicon etc. and Al-Cr, Al-Mg, Al-Ti intermediate alloy is at argonUnder the condition of gas shield, carry out melting, smelting temperature is 770 DEG C, and temperature retention time 20 minutes, afterwards willLiquation pours into alloy-steel casting, and pouring temperature is 800 DEG C, and casting die is metal type dies, metal pattern dieTool preheat temperature is 150 DEG C, and (2) normalized treatment adopts isothermal annealing, and blank is added to high temperature melting furnaceIn, being heated to 910 DEG C, temperature retention time is 2h, is cooled to 600 DEG C with stove, insulation 5h, then air cooling, (3)Turbine blade is carried out to machined, adopt the automatic milling blade of numerical control input program, adding, introducing in man-hour is lubricatedLiquid, is sprayed in surface of the work, prevents and treats mechanical neoplasia and takes away the heat that processing produces, and this is coolingLiquid is the free of contamination thin ice pellets of a Green, is sprayed on workpiece and tool surface at a high speed, and its fast instantizing is liquidDroplet, (4) Carburization Treatment, carries out high-temperature nitridation, adopts ionitriding that turbine blade is putEnter in nitriding furnace and be total to heat with nitrogen and hydrogen, form nitriding layer on the surface of turbine blade, temperature is controlled at750 DEG C, insulation 3h, Slow cooling, carburizing depth is 0.51 μ m, (5) carry out biliquid to turbine bladeQuenching and lonneal processing, is to be quenched in the surface of the turbine blade that forms nitriding layer, its temperatureDegree control be 820 DEG C and to its cooling tempering, temperature is 160 DEG C, quenching and tempering hardness 55HRC, (6) willTurbine blade is placed in cvd furnace and is heated to 1200 DEG C, with H₂For carrier is by TiCl₄Bring reactor into, willSiC is deposited on blade surface, and (7) antirust, anti-corrosive processing, puts into hydraulic oil by workpiece, and temperature is40-50 DEG C, the time is 20min.

Embodiment bis-

Designed a kind of turbine blade processing and manufacturing processing technology, its material therefor is Al-Mn-Pb-Mg-TiSeries high strength aluminium alloy, has mainly comprised the degree of time column element: Si4.2%, Mn1.3%, Mg0.74%, Ti0.3%, Cr1.48%, Cu < 0.02% comprises Bi mixed of 0.2% Dy and 0.08% simultaneouslyCompound, surplus is aluminium and inevitable impurity thereof. Preferably Si4.2%, Mn1.3%, Mg0.74%, Ti0.3%, Cu < 0.02%, Cr1.48% comprises the mixture of the Bi of 0.2% Dy and 0.08% simultaneously. It addsWork technological process is as follows: (1) alloy melting: by metallic aluminium, magnesium, manganese, titanium, and silicon etc. and Al-Cr,Al-Mg, Al-Ti intermediate alloy carries out melting under the condition of argon gas protection, and smelting temperature is 920 DEG C,Temperature retention time, 27 minutes, afterwards liquation is poured into alloy-steel casting, pouring temperature is 830 DEG C; Water moldTool is metal type dies, and metal type dies preheat temperature is 180 DEG C, and (2) normalized treatment adopts isothermal to move backFire, adds blank in high temperature melting furnace, is heated to 940 DEG C, and temperature retention time is 3h, is cooled to 640 DEG C with stove,Insulation 8h, then air cooling, (3) carry out machined to turbine blade, adopt the automatic milling leaf of numerical control input programSheet, introduces lubricating fluid man-hour adding, and is sprayed in surface of the work, prevents and treats mechanical neoplasia and take away to addThe heat that work produces, this cooling fluid is the free of contamination thin ice pellets of a Green, is sprayed at a high speed workpiece and cutter tableFace, its fast instantizing is liquid droplet, (4) Carburization Treatment, carries out high-temperature nitridation, adopts ionTurbine blade is put into nitriding furnace and nitrogen and hydrogen heat altogether by nitriding, the surperficial shape of turbine bladeBecome nitriding layer, temperature is controlled at 810 DEG C, insulation 4h, and Slow cooling, carburizing depth is 0.78 μ m, (5)Turbine blade is carried out to double quenching and lonneal processing, is to form the turbine blade of nitriding layerSurface quench, its temperature control be 900 DEG C and to its cooling tempering, temperature is 240 DEG C, adjustMatter hardness 67HRC, (6) are placed in turbine blade in cvd furnace and are heated to 1400 DEG C, with H₂For carrier willTiCl₄Bring reactor into, SiC is deposited on to blade surface, (7) antirust, anti-corrosive processing, puts into liquid by workpieceIn force feed, temperature is 50 DEG C, and the time is 25min.

Applicant's statement, the present invention illustrates detailed process equipment and process of the present invention by above-described embodimentFlow process, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that the present inventionMust rely on above-mentioned detailed process equipment and process flow process could implement. Person of ordinary skill in the field shouldThis understands, any improvement in the present invention, the equivalence replacement to the each raw material of product of the present invention and auxiliary elementThe selections of interpolation, concrete mode etc., within all dropping on protection scope of the present invention and open scope.

Claims (1)

1. a turbine blade processing technology that is material with Al-Mn-Pb-Mg-Ti series high strength aluminium alloy,The chemical component weight degree of Al-Mn-Pb-Mg-Ti series high strength aluminium alloy is: Si3.7%-4.2%,Mn0.8％-1.3％，Mg0.52％-0.74％，Ti0.21％-0.3％，Cr1.25％-1.48％,Cu<0.02％,Comprise the mixture of the Dy of 0.001%-0.2% and the Bi of 0.041%-0.08%, surplus is aluminium and not simultaneouslyEvitable impurity, is characterized in that:

(1) alloy melting: by metallic aluminium, magnesium, manganese, titanium, silicon etc. and Al-Cr, Al-Mg, in Al-TiBetween alloy under the condition of argon gas protection, carry out melting, smelting temperature is 770 DEG C-920 DEG C, when insulationBetween, 20-27 minute, pours into alloy-steel casting by liquation afterwards, and pouring temperature is 800 DEG C-830 DEG C, castingMould is metal type dies, and metal type dies preheat temperature is 150-180 DEG C,

(2) normalized treatment, adopts isothermal annealing, and blank is added in high temperature melting furnace, is heated to 910 DEG C-940 DEG C,Temperature retention time is 2-3h, is cooled to 600-640 DEG C with stove, insulation 5-8h, then air cooling,

(3) turbine blade is carried out to machined, adopt the automatic milling blade of numerical control input program, adding introducing in man-hourLubricating fluid, is sprayed in surface of the work, prevents and treats mechanical neoplasia and takes away the heat that processing produces, shouldCooling fluid is the free of contamination thin ice pellets of a Green, is sprayed on workpiece and tool surface at a high speed, and its fast instantizing isLiquid droplet,

(4) Carburization Treatment, carries out high-temperature nitridation, adopts ionitriding that turbine blade is put into nitriding furnaceIn with nitrogen and hydrogen heat altogether, form nitriding layer on the surface of turbine blade, temperature is controlled at 750-810 DEG C,Insulation 3-4h, Slow cooling, carburizing depth is 0.51-0.78 μ m,

(5) turbine blade being carried out to double quenching and lonneal processing, is to form the turbine of nitriding layerQuench in the surface of blade, its temperature control be 820-900 DEG C and to its cooling tempering, temperature is160-240 DEG C, quenching and tempering hardness 55-67HRC,

(6) turbine blade is placed in cvd furnace and is heated to 1200-1400 DEG C, with H₂For carrier is with TiCl4Enter reactor, SiC be deposited on to blade surface,

(7) antirust, anti-corrosive processing, puts into hydraulic oil by workpiece, and temperature is 40-50 DEG C, and the time is 20-25min.